1. GENERAL

DSSD25/DTSD25   Electronical Three-phase Multi-function Energy Meter is a kind of new watthour meter which product by advanced microelectronic, technigyes\computer techniqyes and S.M.T.It is

elaborately desingned and manufactured by our company. It can directly and accurately measure every active and reactive energy both import and export and can do with it by relevant demand of

rate and demand,it also can display the Instantaneous voltage, current, active power, power factors, apparent power, power frequency and so on. All performance guideline is accord with IEC62053-

22 "Electricity metering equipment (a.c.) - Particular Requirements - Part 22: Static meters for active energy (classes 0,2 S and 0,5 S)"、IEC 62053-21:2003"Electricity metering equipment (a.c.) -

Particular requirements - Part 21: Static meters for active energy (classes 1 and 2)"、IEC 62053-23:2003"Electricity metering equipment (a.c.) - Particular requirements - Part 23: Static meters for

reactive energy (classes 2 and 3)"、“IEC 62052-11:2003Electricitymetering equipment (a.c.) - General requirements , tests and testconditions-part 11:Metering equipment. DL/T 614 "Multifunction electricity meterring equipment(A.C.)",and the communication is accord with DL/645 "Multi-function watt-hour meter communication protocol"、“MODBUS RTUcommunication protocol”.

This series of manufactures have two RS485 interfaces with mutual independence and one optical port,it can program or data reading through RS485 or optical port.It also can set time consumption .

      This energy meter also have the functions of centennial calendar clock,the record of events, waking up and data reading during power break.Because of steady performance,good precision,

comprehensive function , easy manipulation,and credible measure ,it be regarded as a ideal calculatedly aphance.Basic functionA high - speed and high - precision AC voltage current acquisition

module is embedded , the sampling precision is high , and the electric energy metering is accurate in real time ;The time-sharing metering combines active power, positive and negative active

electricity and demand, combined reactive power, four quadrant reactive power, and has 485 functions of communication and infrared communication.Excellent electromagnetic compatibility，

Resist the interference of high pressure peak pulse, strong magnetic field, strong static electricity, lightning surge, and have strong adaptive ability range of temperature；Three-phase power supply

(i.e. line power supply mode),The electric energy meter can still work normally when any phase or the two phase and four wire in the three-phase three wire is broken down.In the case of loss of

AC power, the meter can keep the data and maintain the clock chip.Low power consumption;Sealing design,PVC waterproof and flame retardant material, wall hanging structure, compact size, easy

to install.

2.1 Measurement function

1).Measure active energy import and export in four rates(the active energy’s measurement mode can set)

2).Measure reactive energy import and export in four rates(the reactive energy’s measurement mode can set)

3).Measure total active energy,total reactive energy,active energy in every phase for the both the current and last month , reactive energy in every phase for the cunrrent month.

4).Measure reactive energy in four rates at four quadrants.

5).Mesure active maximum demand import and export,reactive maximum demand import and export and the four quadrant”s reactive maximum demand with time stamp.

6). Record three months’ data for energy and demand;record tweleve months’ data for active energy import and active maximum demand import.

2.2 Multi-rates function

1).Four rates,14 period, 8 day time table, 14 year time zone, 254 public holiday;

2)The meter has the function of programming and recording time table and settlement day.

3)2 sets of time zone tables and 2 sets of daily schedule;

4)The out-configure’s clock chip have functions of calendar,hour format and leapyear auto switch.

2.3 Display function

1).LCD display,it can display clear at the temperature -30℃ to 55℃.

2)Data scroll display function(the number of the scroll display can’t exceed   96),the scroll display code,the scroll-display sequence can be programed discretionarily

3).Data key display function(the number of the manual scroll display can’t exceed 96), the key display code,the key display sequence can be programed discretionarily.

4).Using the remote infrared controller can check any data content.

5).The data content of LCD display have English and related symbols for hint.

2.4 Communication function

1).The meter have two RS485 interfaces and one optical port, PC or HHU can use this ports to communicate with meter at the same time,and it will not interfere each other .When they communicating;

the optical port is used for programmable and data reading.,it also be used for checking the meter’s data as remote control.

2).The RS485 interfaces can insulate by electricity to the meter inside,and it is designed to avoid the thunder’s attack.

3). The communicationg ‘s protocol is DL/T 645、MODBUS RTUcommunication protocol.

2.5 Output function

1）Has the function of pulse test port output, and has telecontrol pulse output for active energy import and export, and telecontrol pulse output for reactive energy import and export.   

2).Have multifunction signal outputs,such as 1HZ clock,the warning signal for overload and loss of voltage, demand interval for meter’s test .

3).Have signal outputs for warning.

4)Remote output function (optional): it has the function of pulse test port output, and has positive and reverse   reactive power, far artery impulse output, forward and backward reactive power

remote artery impulse output function.

5)Analog output function (optional): 4-20mA analog output function..

2.6.The function of event record

   1).Real time measurement of A, B, C three phase voltage, current, power and other effective values and current frequency

   2).It has the following functions: loss of voltage, phase interruption, loss of current, full voltage loss, voltage reverse phase sequence, undervoltage, overvoltage, overcurrent, interruption,

unbalanced current, overload, total power factor, stop call, programming, zero clearing and time calibration.

2.7.The special function

1).Waking up and data reading during power break

2).Display the information for failure,the function of   warning(the LED and display);

3).It has the functions of timing freezing, instantaneous freezing, convention freezing, daily freezing and whole freezing.

4).Record the data of the electric meter before zero clearance.

   5).Password locking function: after the password verification 3 errors, the liquid crystal will show "", at this time the meter will automatically lock up for 24 hours.

6）Has the auxiliary power supply function(optional).

   7）Load curve recording function(optional)

Open cover recording function;

2.8.The analog output function (optional)

     The instrument has analog output and output function (hardware and software support). The output of the measurement is output in analog form. The analog output can be set to any one of

the 23 measuring quantities. The analog output is set as follows:

                            Analog quantization output setting

The data of all analog quantum output sets are 2 bytes SX according to a certain formula, and the range of the value is 1~9999 (the absolute value).

                  Data transformation formula for analog quantum output and output

Switch output / analog variable output project setting

3. Technical data

3.1 Specification and model(See Table 1)

Table 1

3.2 Battery working parameters

Clock accuracy：day error ≤0.5s（23℃）

  Battery capacity ：≥1200mAh

Data storage time after power cutting off：≥10 years (using new battery)

3.3 Electric parameters

       Voltage of specified operating range：0.9Un～1.1Un

       Voltage of limit operating range：0.8Un～1.15Un

       Power consumption of voltage circuit :< 1.5W、6VA

       Power consumption of current circuit(Ib<10A)：< 0.2VA

       Power consumption of current circuit(Ib≥10A)：< 0.4VA

       Scope of work provided for auxiliary power supply:0.8Umin～1.2Umax （100V～240V，AC and   DC adaptive）

       Voltage of battery for data storing：3.6V（DC）

           Voltage of battery for data reading after power outage：6.0V（DC）

       Auxiliary power supply:Auxiliary power consumption:＜10VA ;

                    Power consumption of voltage circuit :≤ 0.5 VA

3.4 Climatic condition

    Normal working temperature：-25℃～+55℃

    Limited range of temperature：-40℃～+70℃

    temperature for storage and transport：-40℃～+70℃

Relative humidity：Annual mean ≤75%

    For 30 days , these days being spread in a natural manner over one year:95%

    Occasionally on other days:85%

3.5 Technical parameters

          The number of tariff：4

          The number of time zone：14

The range of measure：-799999.99 kWh～799999.99 kWh , -799999.99 kvarh～799999.99 kvarh

Class index：0.5

Display Type：LCD

Communication baud rate：

        RS485①interface：1200bps～9600 bps(Default2400bps)

                  RS485②interface：1200bps～9600 bps(Default2400bps)

                  RS485②interface：1200bps～9600 bps(Default9600bps（MODBUS RTU）)

                  Optical interface： 1200bps

          Communication protocol：DL/T 645”Multifunction electricity meterring equipment”“MODBUS RTUcommunication protocol”.（RS485②interface）

3.6 Mechanical Parameters

Outline dimension：295mm175mm82mm (With pothook)

Installation dimension: 245mm150mm

Weight: Approx 2.3kg

4. Meter installation and connection

4.1 The meter should be fixed on the place that indoors and should be ventilation and dry to ensure that the installation is safe and reliable.If it is a dirty or possible damage place ,the meter should be protectedinaabinet.

Fig. 1: Meter profile

4.2 At the top of the meter ,there is a hole that can be fixed by a screw(M410),at the below of the meter ,there are two holes that can be fixed by two screws(PA410 or PA412).please use the sizes as follows to drill the soleplate,and the meter’s base should be fixed in the place where is hard ,fireproof and no-shake.

4.3 The meter shoule be wired correctly follow the diagram.Advise to use copper or copper connectors as the lines to connect the terminal block.The screw in the terminal cover should be tightened to avoid burnned that caused by the wire who are too thin or not chonnect well.

4.4 Terminal connection diagram

4.4.1 Multifunction terminal connection diagram (shown in Fig.2)

   （For reference only，the fact is showed on the connection diagram of the cover negative）

Fig.2 Multifunction terminal connection diagram(Telecontrol output function)

Fig.3 Multifunction terminal connection diagram

Fig.4 Multifunction terminal connection diagram(1 way simulation + telecontrol output function)

Fig.5 Multifunction terminal connection diagram(2 way simulation)

4.4.2 Power terminal connection diagram（shown in Fig.6）

3X220/380V   Straight type(large current/medium current)Three-phase four-wire

3X220/380V   ≤3 X1.5(6)A   Three-phase four-wire

3X57.7/100V   ≤3 X1.5(6)A   Connection through the voltage and current transformer

3X100V (Straight type)Three-phase three-wire

3X100V Straight type(B phase display)   Three-phase three-wire( B phase measurement)

3X100V   ≤3 X1.5(6)A

3X100V   ≤3 X1.5(6)A (B phase display)

Connection through the voltage and current transformer

Fig.6 Power terminal connection diagram

4.4.3 The schematic of active and reactive ‘s port for test output

The output of optocoupler in the meter       (The duty cycle is 1:1 when the cycle less than 200ms)  

4.4.4 The schematic of the 1Hz clock for test output

5. Panel and symbol

Symbols	Explanations
	Units: kWh－active energy   kW—active demand   kVA－apparent power   kvarh－reactive energy   kvar－reactive demand
	Proguamming is available
	Demand resetting locked symbol, it will appear after you have finished demand resetting successfully, and it will persist for about 5 minutes, which means demand resetting is not allowed during this period
	Battery state，it will flash when 3.6V-battery voltage is not sufficient
	LCD alarm indication
	Communication symbol (flash during communication)
	Stand for A current，B current ,C current; disappear while current break .
	Stand for A voltage, B voltage, C voltage; flash while under voltage or over voltage，disappear while voltage break
	Current energy and energy direction
	T1，T2，T3，T4 represent Tariff 1，Tariff 2，Tariff 3 and Tariff 4
	Current data
	last month，the month before last
	Display No.
	Display data

Explanation of LCD symbols

6. Transport and storage

The meter shall not be subjected to severe impact during transport and un-packing, and be transported and stored according to requirements of national standards GB/T15464 “General technical requirements for packaging of instruments and apparatus”. Keep the meter on the shelves with its original package during storage, the stacking height shall not be higher than five layers. The storing place should be keep clean and the ambient temperature shall be within the range of-25℃～+70℃, with relative humidity less than 85%, and no corrosive gasses in the atmosphere.

7. Warranty

Only in the conditions that the user fully follows the operating instructions and keeps lead seal intact, the manufacturer will provide repair or replacement free of charge within 18 months after the date of shipment for the meter that has nonconformance to the technical requirements.

8. Appendix   Instruction of remote infrared controller

The remote infrared controller is designed to help users to see all the data and parameter,the basic function of it is to check the content of Items,to reading the datas,and to make the meter scroll display.

The remote infrared controller’s form is as follow。

Figure and function keys:

Figure keys：【0～9】keys

【0】 key：display all the content of the LCD。

【1～9】keys：push 0~9 key to display the corresponding

content of each item.

For example, to display the content of Item 1.03, push the key 【1】, LCD will display 01.00 item, then push【↓】 key three times and it will display the content of Item 1.03

Function keys:

【关闭】key：when LCD is displaying，push 【关闭】 key for one time，all the items on LCD will disappear, and it will switch into auto scroll display automatically after 8 seconds.

【↑】【↓】key：Push 【↑】key to display the content of the previous item,             

                   Push 【↓】key to display the content of the next item.

【1-】key：push this key and ０~９key subsequently to display the content of Items 10~19 in the meter.

【2-】key：push this key and ０~９key subsequently to display the content of Items 20~29 in the meter.

【3-】key：push this key and ０~９key subsequently to display the content of Items 30~39 in the meter.

【4-】key：push this key and ０~９key subsequently to display the content of Items 40~49 in the meter.

【5-】key：push this key and ０~９key subsequently to display the content of Items 50~59 in the meter.

【6-】key：push this key and ０~９key subsequently to display the content of Items 60~69 in the meter.

【7-】key：push this key and ０~９key subsequently to display the content of Items 70~79 in the meter.

【8-】key：push this key and ０~９key subsequently to display the content of Items 80~89 in the meter.

【9-】key：push this key and ０~９key subsequently to display the content of Items 90~99 in the meter.

For example, to display the content of 88.03, push【8-】key first, then push figure key【3】, LCD will display 83.00, push↓key repeatedly till 88.03 is displayed.

【键显】key：Manual scroll display of preset content can be achieved by pushing this key.

【循显】key: key: scroll display of preset content can be achieved by pushing this key.

【查询】key: This key is special to display current date and time. When pushing this key, Energy meter will display current date and time in scroll.

Our company has the right to upgrade the product and update this manual, if there’s something different in the content, we would like to have your understanding!